JPH10247123A - Noise reduction system for information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the noises which are caused by a cooling fan when an acoustic device is used by stopping the cooling fan or decreasing its rotational frequency only when the acoustic device is used. SOLUTION: A user gives a program to a CPU 2 for use of an acoustic device 4 after he turned on a power supply and confirmed the available state of a personal computer. Then the user manually turns on a double-pole switch 7 of the personal computer. Thus, a microphone 6 is connected to the device 4 via one of both sides of the switch 7 and at the same time the ON information of the microphone 6 is sent to a power unit 1 as a switching signal S5 via the other interlocking side of the switch 7. Under such conditions, the unit 1 recognizes the ON state of the microphone 6 owing to a fact that the signal S5 is equal to 1 and then stops a cooling fan 8 or decreases its rotational frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a noise reduction method for an information processing device such as a personal computer, and more particularly to a noise reduction method for an information processing device having an audio device.

[0002]

2. Description of the Related Art Conventionally, in an information processing apparatus provided with a power supply device and a cooling fan, a cooling fan is provided at a fixed rotational speed assuming the maximum allowable number of attached devices irrespective of the presence or absence of built-in attached devices. Had been driven by. For this reason, when the accessory device is not mounted on the information processing device or when the accessory device is partially mounted, there is a problem of waste of power consumption and noise caused by the cooling fan.

As an example which solves such a problem, there is a power supply device of an information processing apparatus disclosed in Japanese Patent Application Laid-Open No. 3-10308. According to this publication, a signal indicating the presence or absence or the number of attached devices incorporated in an information processing device is input, and in response to the signal, the information processing device incorporating the attached device or the information processing device not incorporating the attached device is cooled. The voltage applied to the cooling fan is switched and controlled so that the number of rotations required for the rotation is attained.

[0004]

In the above-mentioned prior art, since the cooling fan is controlled depending on whether the attached device is mounted, the cooling fan is automatically stopped only when the acoustic device is used. Therefore, there is a problem that it is not possible to reduce noise inputted to the microphone and to improve quality in voice communication, voice recording, and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a noise reduction method for an information processing apparatus which can reduce the generation of noise due to a cooling fan when using an acoustic device.

[0006]

According to a first aspect of the present invention, there is provided a noise reduction method for an information processing apparatus including an audio device and a cooling fan, wherein the noise reduction method is performed while the audio device is in use. Is characterized in that the cooling fan is stopped or the rotation speed of the cooling fan is reduced.

A second noise reduction method for an information processing apparatus according to the present invention is a noise reduction method for an information processing apparatus provided with an acoustic device and a cooling fan, wherein the microphone converts air vibration into an analog signal, and a switch. When the microphone is on, the microphone is connected to the audio device and an on signal is sent to the power supply device. When the switch is off, the microphone is disconnected from the audio device and an off signal is sent to the power supply device. A switch unit, stopping the cooling fan or reducing the rotation speed of the cooling fan by receiving the ON signal, and setting the cooling fan to a normal operation before using the acoustic device by receiving the OFF signal. And a power supply device for controlling.

According to a third noise reduction method of an information processing apparatus of the present invention, a CPU for executing a program for using an audio device and transmitting use start information or use end information of the audio device as a bus signal; Receiving the use start information of the bus signal, starting the analog / digital conversion function of the audio device, sending the audio device use start signal to the analog switch unit and the power supply device, and receiving the use end information of the bus signal The analog of the sound device
A sound controller that stops the digital conversion function and sends an audio device use end signal to the analog switch unit and the power supply device; and an audio device that starts and stops the analog / digital conversion function according to an instruction from the sound controller. A microphone that converts air vibration into an analog signal, the microphone and the audio device are connected by a switch by receiving the audio device use start signal, and the microphone is received by receiving the audio device use end signal. An analog switch section for separating the acoustic device by a switch, a cooling fan whose operation, stop, or rotation speed is controlled by the power supply device; and stopping the cooling fan by receiving the audio device use start signal or stopping or Cooling fan rotation Lowering the, characterized by having a a power supply device which controls to the normal operation of the prior acoustic device using the cooling fan by receiving the acoustic device use end signal.

[0009]

Embodiments of the present invention will be described with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention. In addition to supplying a constant voltage power supply V to various electronic circuits, the state of a switching signal S5 is monitored to control the power supply of a cooling fan. A power supply device 1, a CPU 2 which executes a program given from the outside and sends information to a bus as a bus signal S1, a sound controller 3 which reads the bus signal S1 and controls the audio device 4 by a control signal S2, and a speaker 5 The analog signal S4 input from the volume control and microphone 6 is A / D converted and sent to the sound controller 3 as a control signal S2 of a bidirectional control signal, and the control signal S2 sent from the sound controller 3 is DA converted. Device 4 to send to speaker 5
And a speaker 5 for mechanically converting the analog signal S3 into air vibration to reproduce sound, and
4 is a manual switch that determines ON / OFF of the microphone 6 according to the user's intention. The analog switch controls the analog signal S4 input from the microphone 6 to the audio device 4, and turns on and off the microphone 6. The OFF information is transmitted to the power supply 1 by the switching signal S5.
, And a cooling fan 8 whose operation, stop or rotation speed is controlled by the supply voltage from the power supply device 1.

Note that the power supply 1 has a switching signal S
5 is “1”, the power supply voltage of the cooling fan 8 is set to 0V or reduced, and when the switching signal S5 is “0”,
The power supply voltage of the cooling fan 8 is set to the normal state. The cooling fan 8 becomes lower in speed as the power supply voltage decreases, and stops at 0V.

The switching signal S5 is pulled up by + 5V via the resistor R, and is fixed to be "1" when the microphone 6 is on and "0" when it is off.

Next, the operation of the first embodiment of the present invention will be described in detail with reference to FIG.

When the user turns on the power, the power supply device 1 starts supplying the constant voltage power supply V, and the personal computer is ready for use. The user turns on the power
After that, it is confirmed that the personal computer is in a usable state, and a program for using the audio device is provided and the CPU 2 is caused to execute the program. CP via the bus signal S1
The sound controller 3 receiving the command from U2 sends the control signal S2 to the audio device 4 to start the A / D conversion function of the audio device 4.

After confirming these operations, the user checks the two-pole switch 7 provided in the personal computer.
Is turned on manually. Thereby, the microphone 6 is connected to the audio device 4 via one of the two-pole switches 7. At the same time, the ON information of the microphone 6 is transmitted to the power supply device 1 as the switching signal S5 via the other switch linked with the bipolar switch 7. At this time, the power supply device 1 sets the switching signal S5 to “1”.
Therefore, the ON state of the microphone 6 is recognized, and the cooling fan 8 is stopped or the rotation speed of the cooling fan 8 is reduced.

In this state, when the user utters a voice to the microphone 6, the user's voice is sent to the audio device 4 through the two-pole switch 7 as an analog signal S4.

When the user manually turns off the two-pole switch 7 after the end of recording or telephone conversation, the microphone 6 is disconnected from the sound device 4 and the OFF information of the microphone 6 is transmitted as a switching signal S5. It is sent to the power supply 1. At this time, the power supply device 1 recognizes the OFF state of the microphone 6 because the switching signal S5 is “0”, and controls the cooling fan 8 to return to the normal rotation state.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing a second embodiment of the present invention. The configuration of the two-pole switch 7 of FIG. 1 according to the first embodiment of the present invention described above is the analog switch shown in FIG. The only difference is that the switch 9 is replaced. Along with this, +5 V via the resistor R connected to the power supply device 1 shown in FIG. 1 is also unnecessary and has been deleted.

The two-pole switch 7 according to the first embodiment of the present invention is connected to the O
This is a manual switch for determining N / OFF, and a switching signal S5 is sent from the two-pole switch 7 to the power supply device 1. In contrast, the analog switch 9 in the second embodiment of the present invention is a digitally controlled analog switch, and the switching signal S6 for controlling the analog switch 9 and the power supply 1 is
Sent from.

Next, the operation of the second embodiment of the present invention will be described in detail with reference to FIG.

When the user turns on the power supply, the power supply device 1 starts supplying the constant voltage power supply V, and the personal computer becomes usable. The user turns on the power
After that, it is confirmed that the personal computer is in a usable state, and a program for using the audio device is provided and the CPU 2 is caused to execute the program. CP via the bus signal S1
The sound controller 3 receiving the command from U2 sends the control signal S2 to the audio device 4 to start the A / D conversion function of the audio device 4.

The sound controller 3 starts the A / D conversion function of the audio device by the control signal S2, and at the same time, sets the switching signal S6 to "1" and sends it to the analog switch 9 and the power supply device 1. The analog switch 9 connects the microphone 6 and the audio device 4 with the switch by receiving the switching signal S6 of “1”. Further, the power supply device 1 recognizes the start state of the A / D conversion function of the audio device from the fact that the switching signal S6 is “1”, and controls the cooling fan 8 to be stopped or the rotation speed of the cooling fan 8 to be reduced. I do.

In this state, when the user utters a voice to the microphone 6, the user's voice is sent to the audio device 4 via the analog switch 9 as an analog signal S4.

When the user performs a termination operation after the end of the recording or the telephone call, a termination signal is transmitted to the sound controller 3 via the CPU 2. The sound controller 3 sets the switching signal S <b> 6 to “0” and sends it to the analog switch 9 and the power supply 1. The analog switch 9 switches off the microphone 6 from the acoustic device 4 by receiving the switching signal S6 of “0”. In addition, the power supply device 1 recognizes the use end state of the audio device from the fact that the switching signal S6 is “0”, and controls the cooling fan 8 to return to the normal rotation state.

[0025]

As described above, the effect of the present invention is as follows.
By automatically stopping the cooling fan or reducing the number of revolutions only when the acoustic device is used, noise input to the microphone is reduced, and as a result, quality improvement in voice communication, voice recording, and the like can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 power supply device 2 CPU 3 sound controller 4 sound device 5 speaker 6 microphone 7 two-pole switch 8 cooling fan 9 analog switch R resistance S1 bus signal S2 control signal S3 analog signal S4 analog signal S5 switching signal S6 switching signal V constant voltage power supply

Claims (3)

[Claims] 1. A noise reduction method for an information processing apparatus including an acoustic device and a cooling fan, wherein the cooling fan is stopped or the number of revolutions of the cooling fan is reduced while the acoustic device is in use. A noise reduction method for an information processing device. 2. A noise reduction method for an information processing apparatus including an audio device and a cooling fan, wherein the microphone converts air vibration into an analog signal, and the microphone is connected to the audio device when a switch is turned on. And an on signal to the power supply device, and a switch unit for disconnecting the microphone from the sound device and sending an off signal to the power supply device when the switch is off, and receiving the on signal to receive the on signal. A power supply device for stopping the cooling fan or reducing the rotation speed of the cooling fan, and receiving the off signal to control the cooling fan to perform a normal operation before using the acoustic device. Noise reduction method for processing equipment. 3. A CPU for executing a program for using an audio device and transmitting use start information or use end information of the audio device as a bus signal, and receiving the use start information of the bus signal and receiving the audio signal. Starts the analog / digital conversion function of the device, sends an audio device use start signal to the analog switch section and the power supply device, receives the end signal of use of the bus signal, and stops the analog / digital conversion function of the audio device. A sound controller for transmitting an audio device use end signal to the analog switch section and the power supply device, an audio device for starting and stopping the analog / digital conversion function according to an instruction from the sound controller, A microphone for converting to a signal, and using the acoustic device And said and said microphone acoustic device connected by the switch by receiving a start signal,
An analog switch unit that switches off the microphone and the audio device by receiving the audio device use end signal by a switch; a cooling fan whose start, stop, or rotation speed is controlled by the power supply device; Upon receiving a start signal, the cooling fan is stopped or the number of revolutions of the cooling fan is reduced, and by receiving the sound device use end signal, the cooling fan is controlled to be in a normal operation before using the sound device. A noise reduction method for an information processing device, comprising: a power supply device;